They are clearly spending a lot more than the middle class, if the results of Cramer's 'Gatsby Index' are any indication.

NEW YORK ( TheStreet) -- The rich aren't like you and me, Jim Cramer reminded his "Mad Money" TV show viewers Thursday as he revisited his "Great Gatsby" index of stocks that cater to the rich and compared them to the markets overall.

Cramer said that overall, his list of 11 premium stocks has trounced the S&P 500, delivering a return double that of the broader averages since the list debuted on March 13.

Among the winners were Michael Kors ( KORS), which saw a 30% rise in same-store sales; Lululemon Athletica ( LULU), which rebounded nicely from its yoga pants recall; and Whole Foods Market ( WFM), which showed its true colors by surprising all of the anaylsts.

There were some laggards in the index, noted Cramer, including Ralph Lauren ( RL), Toll Brothers ( TOL) and Estee Lauder ( EL). There were also disappointing results from Nordstrom ( JWN), said Cramer.

But all of those negatives were promptly undone by Saks ( SKS), the high-end retailer that popped a full 32% since March, making it the best-performing stock in Cramer's Gatsby index.

So while the middle class may still be struggling to qualify for a home loan or find work, all appears to be well with the rich, who are clearly spending a lot more than you or me, Cramer concluded.

Go Royal

Shares of the Royal Bank of Scotland ( RBS) may still be hated by investors, but that's exactly why they should consider buying it, Cramer told viewers.

He said the U.K. government will likely be selling its 82% stake in the bank over the next 18 months. If RBS follows in the footsteps of American International Group ( AIG) and Citigroup ( C), that sale will be the start of an amazing move to the upside.

Cramer reminded viewers that shares of AIG have been steadily rising since the U.S. government sold its stake in the firm last year. Meanwhile, shares of Citigroup have more than doubled since the bank repaid its government loan. He said European banks may still be out of favor on Wall Street but that's all the more reason to like RBS.